From: Patrick Donnelly <pdonnell@ibm.com>
Date: Tue, 28 Jan 2025 18:06:36 +0000 (-0500)
Subject: mds: do not path traverse a damaged dirfrag
X-Git-Tag: testing/wip-jcollin-testing-20251107.120120-reef^2~1
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=46ef9103ee09672d2316f86fa14aa00b1b12e005;p=ceph-ci.git

mds: do not path traverse a damaged dirfrag

Fixes: https://tracker.ceph.com/issues/69695
Signed-off-by: Patrick Donnelly <pdonnell@ibm.com>
(cherry picked from commit 3243af47d60558227263203cdc4f9b9f0ebb3f5e)

Conflicts:
	src/mds/MDCache.cc: no pdir
---

diff --git a/src/mds/MDCache.cc b/src/mds/MDCache.cc
index e4eab741d82..810d568ef13 100644
--- a/src/mds/MDCache.cc
+++ b/src/mds/MDCache.cc
@@ -8388,6 +8388,12 @@ int MDCache::path_traverse(MDRequestRef& mdr, MDSContextFactory& cf,
     }
     ceph_assert(curdir);
 
+    if (mds->damage_table.is_dirfrag_damaged(curdir)) {
+      dout(4) << "traverse: stopped lookup at dirfrag "
+              << *curdir << "/" << path[depth] << " snap=" << snapid << dendl;
+      return -CEPHFS_EIO;
+    }
+
 #ifdef MDS_VERIFY_FRAGSTAT
     if (curdir->is_complete())
       curdir->verify_fragstat();